<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="box">
        hello
        <p>jack</p>
    </div>
    <script>

        const box = document.getElementById('box');

        console.log(box.innerHTML);
        console.log(box.outerHTML);
        console.log(box.textContent);//只获取文本，删除标签



    </script>
</body>

</html>